How about the song I should be learning now? In my case that would have to be "Old Folks Boogie" because what you are asking was way more than 5 minutes ago1
6 years old taking piano lessons, it probably Twinkle Twinkle, but it's kind of foggy. No wait, I'm confusing my son's Susuki piano lessons with mine. Truthfully I only remember that I loved music but hated the piano lessons. I wanted to learn trumpet like my big brother.
Had to wait till 7th grade for Trumpet. First song was probably something like the Notre Dame fight song -- still kind of foggey though.
Eight grade I switched to French Horn. Fist song was likely something like the Merry Widow's Waltz or Santa Lucia -- very foggy.
Sophomore in HS got a guitar -- big time John Stewart and Kingston Trio fan, so it had to be something like Greenback Dollar -- later that year I got my first bass, a German made Framus. Bill Wyman played a Famus so I learned Have Mercy, which was probably one of the first songs my first real band that actually played gigs performed.
We did all the easy stuff. 1/3 Kinks, 1/3 Stones, and 1/3 everything else.
Then I got my first Fender J-Bass and instantly became another Leo Lyons (TYA) playing Goin' Home, or maybe a John McVie playing Black Magic Woman. I don't know, it's all kind of foggy. Most of those first songs were really bad! I have probably forgotten, accidentally, on purpose! Hmmm, I wonder where I put that old Waiting for Columbus CD by Little Feet.
The Old Folks Boogey -- "You know that you are over the hill, when your mind makes a promise that your body can't fill!"